Component test coverage

[charles-turner-1]

We don't have perfect coverage, with a lot of branches/ functions missing in many cases:

------------------------------|---------|----------|---------|---------|-----------------------------------------
File                          | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s                       
------------------------------|---------|----------|---------|---------|-----------------------------------------
All files                     |   85.39 |    85.01 |   71.25 |   85.39 |                                         
 components                   |   98.28 |    88.76 |    80.3 |   98.28 |                                         
  DatastoreDetail.vue         |     100 |    90.16 |   81.81 |     100 | 142-143,161,186,209,224                 
  DatastoreEntryModal.vue     |   96.77 |    90.47 |     100 |   96.77 | 57-58                                   
  DatastoreHeader.vue         |     100 |      100 |     100 |     100 |                                         
  DatastoreTable.vue          |     100 |    89.47 |      75 |     100 | 107-114                                 
  FilterSelectors.vue         |     100 |       80 |     100 |     100 | 10,48-49,70-71                          
  LongUrlConfirmDialog.vue    |   93.54 |      100 |      60 |   93.54 | 82-83                                   
  MetacatHeader.vue           |   86.11 |    46.15 |      60 |   86.11 | 83-85,96-100,103-104                    
  MetacatRowDetailModal.vue   |     100 |    89.28 |   66.66 |     100 | 186,210-220                             
  MetacatTable.vue            |     100 |    93.54 |      75 |     100 | 242-243                                 
  QuickStartCode.vue          |    95.2 |    91.17 |   85.71 |    95.2 | 124-125,247-249,297-299                 
  RequiredProjectsWarning.vue |     100 |      100 |     100 |     100 |                                         
  TagList.vue                 |     100 |      100 |     100 |     100 |                                         
  YamlNode.vue                |     100 |      100 |     100 |     100 |                                         
  YamlTree.vue                |     100 |      100 |     100 |     100 |                                         
 stores                       |   37.93 |       35 |   28.57 |   37.93 |                                         
  catalogStore.ts             |   37.93 |       35 |   28.57 |   37.93 | ...,431-437,460,466-486,531-540,547-548 
------------------------------|---------|----------|---------|---------|-----------------------------------------